async function main() {
   for (let i=0;i<90;i=i+5){
      await M.delayMs(10);
      ggbApplet.evalCommand('α=' + i + '°');
      for (let j = 90; j < 180; j=j+5) {
         await M.delayMs(10);
         ggbApplet.evalCommand('β=' + j + '°');
      }


   }
}

main();